Pumpkin Time (2021)

Kang Tae Joo and Shin Hae Won were inseparable friends, sharing the love of baseball. But then Tae Joo's parents tells him he is moving to the USA, Tae Joo hopes to see his friend again, many years pass and Tae Joo doesn't give up. Tae Joo eventually comes back to South Korea to find his friend many years later only to find that Hae Won is now a girl.